Answer:
c. Observational studies have both independent and dependent variables.
d. Observational studies can be used to test hypothesis.
Explanation:
Observational studies are ones in which a researcher makes observations about his thoughts and views. He observes the risk and other effects before actual test takes place. This is usually the initial phase of research where observations are made for suitability of certain things that are to be researched. There is initial feasibility test conducted to identify whether the further research process is beneficial or not.
I believe the answer is: B.the American Revolution
during the american revolution, The american colonists justify the action to revolve by stating that they felt that the british government treated them unfairly and they need to get out from their influence through the revolution. Jefferson Davis at that time argue that the southern states' action was the exact same thing.
Explanation:
D More production of cars
<span>In this example, squirming and giggling is a(n) "conditioned response".
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A conditioned response is a conduct that does not fall into place, but rather should be learned by the person by matching an impartial boost with an intense stimuli. The potent stimulus is one that does not require any learning or molding to react to properly. Natural stimuli don't at first have any reaction related with them, and the right reaction must be learned through rehashed pairings with an potent stimuli.
